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al 2 o 3 -sio 2 Preparation method of composite material

A composite material, al2o3-sio2 technology, used in ceramic products, other household appliances, household appliances, etc., can solve the problems of cracking, affecting the thermal insulation effect, low thermal conductivity, etc.

Active Publication Date: 2021-06-08
西科微纳(重庆)新能源技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

al 2 o 3 Aerogel has nanoporous structure, high porosity, low thermal conductivity and good temperature resistance, but Al 2 o 3 The brittleness of airgel itself makes its structure easy to be destroyed, forming fragmented small pieces or powder, which affects the heat insulation effect

Method used

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  • al <sub>2</sub> o <sub>3</sub> -sio <sub>2</sub> Preparation method of composite material
  • al <sub>2</sub> o <sub>3</sub> -sio <sub>2</sub> Preparation method of composite material
  • al <sub>2</sub> o <sub>3</sub> -sio <sub>2</sub> Preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a kind of Al 2 o 3 -SiO 2 The preparation method of composite material, comprises the following steps:

[0026] Step 1: Add 10 mL of water and 90 mL of alcohol to 37.5 g of aluminum nitrate, stir for 30 minutes to obtain an aluminum nitrate solution, then add 40 mL of propylene oxide with a mass fraction of 98% and stir rapidly for 2 minutes to obtain a glue solution;

[0027] Step 2. Pour the obtained glue solution into the SiO 2 Die impregnation of fiber mat with SiO 2 Fiber felt, stand still for 10min to get Al 2 o 3 Wet Gel-SiO 2 The fiber felt composite material is then placed in an oven with a temperature of 60 °C to age for 2 days, then soaked in alcohol solvent exchange for 3 times, each time for 24 hours, and finally Al 2 o 3 -SiO 2 Composite materials; Glue and SiO 2 The mass ratio of the fiber mat is 2.4:1.

[0028] figure 1It is the Al prepared in Example 1 2 o 3 -SiO 2 The scanning electron microscope image of the composite material, it can b...

Embodiment 2

[0033] a kind of Al 2 o 3 -SiO 2 The preparation method of composite material, comprises the following steps:

[0034] Step 1. Add 10 mL of water and 90 mL of alcohol to 40 g of aluminum nitrate, stir for 30 minutes to obtain an aluminum nitrate solution, then add 40 mL of propylene oxide with a mass fraction of 98%, and stir rapidly for 2 minutes to obtain a glue solution;

[0035] Step 2. Pour the obtained glue solution into the SiO 2 Die impregnation of fiber mat with SiO 2 Fiber felt, stand still for 10min to get Al 2 o 3 Wet Gel-SiO 2 The fiber felt composite material was then placed in an oven at a temperature of 65 °C to age for 2 days, then soaked in alcohol solvent exchange for 3 times, each time for 24 hours, and finally obtained Al by supercritical alcohol drying. 2 o 3 -SiO 2 Composite materials; Glue and SiO 2 The mass ratio of the fiber mat is 2.4:1.

[0036] Al prepared in this example 2 o 3 -SiO 2 The contact angle of the composite reaches 135.85°...

Embodiment 3

[0039] a kind of Al 2 o 3 -SiO 2 The preparation method of composite material, comprises the following steps:

[0040] Step 1. Add 10 mL of water and 110 mL of alcohol to 45 g of aluminum nitrate, stir for 30 minutes to obtain an aluminum nitrate solution, then add 50 mL of propylene oxide with a mass fraction of 98% and stir rapidly for 2 minutes to obtain a glue solution;

[0041] Step 2. Pour the obtained glue solution into the SiO 2 Die impregnation of fiber mat with SiO 2 Fiber felt, stand still for 10min to get Al 2 o 3 Wet Gel-SiO 2 The fiber felt composite material was then placed in an oven at a temperature of 65 °C to age for 2 days, then soaked in alcohol solvent exchange for 3 times, each time for 24 hours, and finally obtained Al by supercritical alcohol drying. 2 o 3 -SiO 2 Composite materials; Glue and SiO 2 The mass ratio of the fiber mat is 2.4:1.

[0042] Al prepared in this example 2 o 3 -SiO 2 The contact angle of the composite reaches 135.57°...

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Abstract

The invention discloses an Al 2 o 3 ‑SiO2 2 The preparation method of the composite material comprises the following steps: step 1, adding water and alcohol to aluminum nitrate, stirring for 30-50 minutes to obtain an aluminum nitrate solution, then adding propylene oxide and stirring rapidly for 1-3 minutes to obtain a glue solution; step 2 , Pour the obtained glue solution into the SiO 2 Die impregnation of fiber mat with SiO 2 Fiber mat, standing for 5-20min to get Al 2 O3 Wet Gel‑SiO 2 The fiber felt composite material is then placed in an oven at a temperature of 50-70°C to age for 1-2 days, then soaked in alcohol solvent exchange for 3-5 times, each time for 12-24 hours, and finally dried by supercritical alcohol get Al 2 o 3 ‑SiO2 2 composite material. Al of the present invention 2 o 3 ‑SiO2 2 The composite material is cheap and readily available aluminum nitrate and SiO 2 Fiber mat is a raw material obtained by impregnation and supercritical drying; the present invention adopts Al 2 o 3 Sol impregnated into SiO 2 Fiber mat method to reduce SiO 2 The thermal conductivity of the fiber mat; the raw material price of the present invention is low and the operation process is simple, and it is expected to realize industrialization.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to Al2O 3 -SiO 2 Methods of preparation of composite materials. Background technique [0002] The current energy crisis has attracted worldwide attention. High-efficiency thermal insulation materials can effectively reduce the accompanying losses in the process of heat generation, transportation, storage and use, and can effectively improve energy utilization efficiency. It is an important way to save energy and reduce economic losses. , Therefore, it has a wide range of applications in high temperature, medium and low temperature fields such as industrial pipelines, low temperature storage and transportation, construction, aerospace, thermal batteries and thermal protective clothing. At present, there are many kinds of heat insulation materials, which can be divided into powder heat insulation materials, porous heat insulation materials, fibrous heat insula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02C04B38/00
CPCC04B30/02C04B2201/32C04B14/303C04B14/4631C04B38/0045
Inventor 毕于铁朱家艺任洪波温尚艳
Owner 西科微纳(重庆)新能源技术研究院有限公司